h awl e y



9 B. R. HAWLEY.

Heating Stove.

Paten ted Dec. 14, 1869.

FIG. 2

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.//V VEA/ TOR:

N PETERS. PHOTO-LITHOGRAPHER, WASHINGTON, u c.

waited giant .13.,n. HAWLEY, or NOIRMYALQIILLINOIS.

Letters Patent N 97,912, dated December 14', 1869.

' COAL-STOVE.

The Schedule referred to in these Letters Patent and making part ofthevaame ,To allivhom it may concern: 3

Be itknown that I, B. R. HAwLnY, of Normal, in the county of McLea-mandin the State of Illinois,

have invented certain new and useful Improvements plates, so attached tothe outside of the fire-chamber .of any heating-stove, furnace, orsteam-boiler, as to great] y increase the heating-surface, the size ofthe fire-pot; l

I have designed this improvement on the \i ell-known principle that heatin metals passes rapidly from parwithout increasing ticle to particle,while in heating air, heatiscommunicated mostly by circulation, and theair coming in direct contact with the heating-surface.

-It -will be readily seen, that by placing a flange vertically in directcontact with the heated surface'of a store, the heat'would be absorbedby the flange, and at once the flange would become itseli'heating-,

surface, and yet not materially obstruct thefiow of air around thestove; and, by multiplying these vertical flanges, or using adeeply-corrugated plate, and attaching it to the store at the bottomofeach corrugation, the fire-surface thus added may be made to equal, oreven quadruple the surface of the original ,stove, and yet thecirculation of air be nearly as free as before the flanges wereattached; and the surface being thus increased, it follows that I canheat a larger volume of air than can be done without the flanges. Bysurrounding the stove or heaterwith an outer drum of iron,'or otherwall, which drum or wall shall also enclose tliefianges, it will be seenthat I at once have a ventilating-stove, and may be set over an airduct,so asto pass the cold air between the stove and drum, and thus bring itinto immediate contact with the heating-surface; or, it used only as acommon heater, without ventilation, the drum may be made so asnot toquite reach the floor, and thus allow, the

air in the room to flow freely up between the stove and drum; g

In order to enable others skilled in the art'to which myinventionappertains, to make and use the same,

I will now proceed to describe its construction and 0pcratlon, referringto the annexed drawings, in which-- Figure l is a vertical section, andi Figure;2, a horizontal section of a stove, with my improvementattached. 7

A represents the fire-chamber of astove, and is provided on its outsidewith a series of vertical curved flanges, B B, of sheet-iron,sheet-copper, or other suitable material, riveted or otherwise securedto the stove, These flanges extend from the grate upward, the entireheight of the stove, and are surrounded by a drum, 0, so constructed asto leave an open space around the lower end of thestore, and alsobetween the inner surface of the drum and the outer edges of the curvedflanges, allowing the air in the room to flow up between the stove andthe drum, becoming heated during its passage. i

Thesma-ll space leftbetween the outer edges of the curved flanges B Band the inner surface of the drum 0, increases the draught, and causesthe air to circulate more rapidly around within the drum, from oneflange to the other. v

This arrangement may be applied to all kinds of heaters, furnaces,steam-boilers, 85c.

I am aware that the arrangement. of a series of straight verticalflanges in a drum is not new; hence I do not claim such to be myinvention.

I contend, that by the use of the curved flanges, I obtain a greaterquantity of heating-surface, and that the heat will hemore effectuallyretained and radiated upon the outer drum.

Having thus fully described my invention,

What Lclaim as new, and desire to secure by Letters Patent, is f Thevertical curved flanges B B, extending from the grate to the top of thestove, and surrounded by an outside drum, 0, with a space between theedges of said flanges and drum, all as herein shown and described. I

In testimony that I claim the foregoing, I' have hereunto set my hand,this 1st day of September,

B. R. HAWLEY.

Witnesses:

- Tnos. S ane,

W. M. HATCH.

